A quick card bolt and milling auxiliary fixture clamp

Abstract

This utility model provides a quick-clamping bolt and a milling fixture, relating to the field of machining technology. The quick-clamping bolt includes a screw, a screw head connected to the screw, and a friction ring. An elastic element is provided at the end of the screw head facing the screw. The friction ring is sleeved on the screw and connected to the elastic element. The elastic force of the elastic element drives the friction ring away from the screw head. The screw head is accommodated in a T-slot on a lathe, and the end of the friction ring away from the screw head abuts against the inner wall of the T-slot. By increasing the maximum static friction between the screw head and the friction ring and the inner wall of the T-slot, the rotation of the quick-clamping bolt in this embodiment is limited, thereby improving the stability of the quick-clamping bolt and thus improving the installation efficiency of the milling fixture.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and more specifically, to a quick-clamping bolt and milling auxiliary fixture. Background Technology

[0002] Currently, after preliminary machining, the workpiece needs to have its end face milled according to process requirements. This requires first installing a milling fixture on a lathe, then installing the workpiece in the fixture for the milling operation. When installing the milling fixture, a connecting bolt is pre-placed in the T-groove on the lathe, with the threaded portion of the bolt facing upwards and extending from the connecting hole of the milling fixture. The milling tool is then fixed to the lathe by tightening the nut. However, because the bolt head is located within the T-groove on the lathe and cannot be fixed in place, the bolt rotates during the tightening process, affecting the installation efficiency of the milling fixture. Utility Model Content

[0003] The problem this invention solves is: how to avoid rotating the connecting bolts to improve the installation efficiency of milling fixtures.

[0004] To address the aforementioned problems, this utility model provides a quick-mounting bolt, comprising a screw rod, a screw head connected to the screw rod, and a friction ring. An elastic element is provided at the end of the screw head facing the screw rod. The friction ring is sleeved on the screw rod and connected to the elastic element. The elastic force of the elastic element drives the friction ring away from the screw head. The screw head is accommodated in a T-slot on a lathe, and the end of the friction ring facing away from the screw head abuts against the inner wall of the T-slot.

[0005] Optionally, the friction ring has a sliding rod at one end facing the screw head, the screw head has a groove, the sliding rod is slidably connected to the groove, and the sliding rod extends along the axial direction of the screw, and the elastic element is sleeved on the sliding rod.

[0006] Optionally, it also includes a limiting block and a retaining seat. The limiting block is located outside the T-slot and is sleeved on the non-threaded portion of the screw and is fixedly connected to the screw. The retaining seat is sleeved on the limiting block and engages with the limiting block, and the retaining seat is also engaged with the T-slot.

[0007] Optionally, the end of the friction ring facing away from the screw head is also provided with an anti-slip structure.

[0008] Compared with related technologies, the quick-release bolt of this utility model uses an elastic element located at the end of the screw head facing the screw rod and connected to a friction ring sleeved on the screw rod. The extension and retraction of the elastic element can be converted into the movement of the friction ring along the length of the screw rod. The elastic force of the elastic element is used to drive the friction ring away from the screw head, and the end of the friction ring away from the screw head is used to abut against the inner wall of the T-slot on the lathe. After the friction ring abuts against the inner wall of the T-slot on the lathe, the elastic force of the elastic element applies two opposite forces to the T-slot through the screw head and the friction ring. Under the action of these two forces, the maximum static friction between the screw head, the friction ring and the inner wall of the T-slot is increased, thereby limiting the rotation of the quick-release bolt in this embodiment, improving the stability of the quick-release bolt in this embodiment, and thus improving the installation efficiency of the milling fixture.

[0009] On the other hand, this utility model also provides a milling auxiliary fixture, including a fixture structure and a quick-release bolt as described above. The base of the fixture structure is used for detachable connection with a lathe via the quick-release bolt, and the fixture structure is also used for clamping and positioning the workpiece to be milled.

[0010] Optionally, the fixture structure further includes a first movable seat, a second movable seat, and a separation transmission mechanism. The first movable seat and the second movable seat are slidably connected to the base. The first movable seat is used to connect with the milling tool, and the second movable seat is used to connect with the workpiece to be milled. The separation transmission mechanism includes two movable ends, which are configured to move away from each other along the milling direction. The first movable seat and the second movable seat are respectively connected to the two movable ends.

[0011] Optionally, the second movable seat is provided with a workpiece positioning groove, which is used to position the workpiece to be milled.

[0012] Optionally, the fixture structure further includes a workpiece support structure, which is located on the side of the second movable seat away from the first movable seat. One end of the workpiece support structure is movably connected to the base, and the other end is inclined toward the second movable seat and used to abut against the workpiece to be milled.

[0013] Optionally, the workpiece support structure includes a support rod, a retaining spring, and a support block. One end of the support rod is rotatably connected to the base via the retaining spring, and the other end of the support rod is rotatably connected to the support block. The support block is used to abut against the workpiece to be milled. The retaining spring is disposed at the rotatable connection position between the support rod and the base, and the elastic force of the retaining spring is used to drive the support rod to rotate toward the second movable seat.

[0014] Optionally, the workpiece support structure further includes a tension spring located between the second movable seat and the top support rod. The two ends of the tension spring are respectively connected to the base and the top support rod, and the elastic force of the tension spring drives the top support rod to rotate toward the second movable seat.

[0015] Compared with related technologies, the quick-clamping bolt of this utility model is used to detachably connect the quick-clamping bolt to the lathe through the base of the fixture structure. During the milling process, the quick-clamping bolt can ensure the stability of the connection between the fixture structure and the lathe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the quick-release bolt in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure when the limiting block and the card holder are engaged in an embodiment of this utility model; Figure 3 This is a schematic diagram of the locking structure in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the locking structure in an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures: 1-Screw; 2-Screw head; 3-Friction ring; 31-Slide rod; 4-Elastic element; 5-Lathe; 6-Limit block; 7-Clad seat; 8-Base; 9-Workpiece to be milled; 10-First movable seat; 11-Second movable seat; 12-Reverse transmission mechanism; 121-First rack; 122-First gear; 123-Second rack; 124-Second gear; 13-Workpiece support structure; 131-Support rod; 132-Support block; 133-Tension spring. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] In the attached figures, the X-axis represents the left-right position, with the positive direction of the X-axis representing the right side and the negative direction representing the left side; the Y-axis represents the front-back position, with the positive direction of the Y-axis representing the front and the negative direction representing the back; and the Z-axis represents the up-down position, with the positive direction of the Z-axis representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X, Y, and Z axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0020] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0021] Combination Figure 1 As shown, this utility model embodiment provides a quick-mounting bolt, including a screw 1, a screw head 2 connected to the screw 1, and a friction ring 3. An elastic element 4 is provided at the end of the screw head 2 facing the screw 1. The friction ring 3 is sleeved on the screw 1 and connected to the elastic element 4. The elastic force of the elastic element 4 is used to drive the friction ring 3 away from the screw head 2. The screw head 2 is used to be accommodated in a T-shaped groove on a lathe 5, and the end of the friction ring 3 away from the screw head 2 is used to abut against the inner wall of the T-shaped groove on the lathe 5.

[0022] Specifically, the quick-release bolt in this embodiment can be a reference to a common bolt. The quick-release bolt in this embodiment includes a screw 1, a screw head 2, and a friction ring 3. The screw head 2 is installed at one end of the screw 1. Multiple mounting holes can be provided at the end of the screw head 2 facing the screw 1, evenly distributed along the circumference of the screw head 2. An elastic element 4 is installed in each mounting hole. The elastic element 4 can be a spring, with one end installed in the mounting hole and the other end extending out of the mounting hole. The friction ring 3 is fitted onto the screw 1, and the end of the friction ring 3 facing the screw head 2 is connected to the end of the elastic element 4 extending out of the mounting hole. The elastic force of the multiple elastic elements 4 tends to drive the friction ring 3 away from the screw head 2. Under the action of the elastic force of the elastic elements 4, the end of the friction ring 3 away from the screw head 2 can press against the inner wall of the T-slot on the lathe 5. During the installation of the milling fixture, the friction ring 3 can be manually pressed to compress the elastic element 4. Then, the quick-release bolt of this embodiment is placed into the T-slot from one end of the T-slot extension direction on the lathe 5, while keeping the friction ring 3 pressed. After pushing the quick-release bolt of this embodiment along the extension direction of the T-slot to the desired position, the friction ring 3 is released, and the elastic potential energy of the elastic element 4 is released. The elastic force of the elastic element 4 drives the friction ring 3 to move upward until it abuts against the inner wall of the T-slot. At this time, the friction ring 3 and the screw head 2 apply two opposite forces to the T-slot under the action of the elastic force of the elastic element 4. Under the action of these two forces, the maximum static friction between the screw head 2, the friction ring 3 and the inner wall of the T-slot is increased, thereby limiting the rotation of the quick-release bolt of this embodiment and improving the stability of the quick-release bolt in use.

[0023] Therefore, in this embodiment, the elastic element 4 is set at the end of the screw head 2 facing the screw rod 1 and connected to the friction ring 3 sleeved on the screw rod 1. The extension and retraction of the elastic element 4 can be converted into the movement of the friction ring 3 along the length direction of the screw rod 1. The elastic force of the elastic element 4 is used to drive the friction ring 3 away from the screw head 2. The end of the friction ring 3 away from the screw head 2 is used to abut against the inner wall of the T-slot on the lathe 5. After the friction ring 3 abuts against the inner wall of the T-slot on the lathe 5, the elastic force of the elastic element 4 applies two opposite forces to the T-slot through the screw head 2 and the friction ring 3. Under the action of these two forces, the maximum static friction between the screw head 2, the friction ring 3 and the inner wall of the T-slot is increased, thereby limiting the rotation of the quick-release bolt in this embodiment and improving the installation efficiency of the milling fixture.

[0024] Optionally, combined Figure 1 As shown, a sliding rod 31 is provided at one end of the friction ring 3 facing the screw head 2. A groove is provided on the screw head 2. The sliding rod 31 is slidably connected to the groove, and the sliding rod 31 extends along the axial direction of the screw 1. The elastic element 4 is sleeved on the sliding rod 31.

[0025] Specifically, the number of slide rods 31 corresponds to the number of elastic elements 4, with each elastic element 4 fitted onto one slide rod 31. The slide rod 31 extends along the axial direction of the screw 1, with one end of the slide rod 31 connected to the end of the friction ring 3 facing the screw head 2, and the other end slidably connected to the groove on the screw head 2. The slide rod 31 can restrict the rotation of the friction ring 3.

[0026] Thus, by setting the sliding rod 31 extending axially along the screw 1 at the end of the friction ring 3 facing the screw head 2, and by sliding the sliding rod 31 in sliding connection with the groove provided on the screw head 2, the sliding rod 31 allows the friction ring 3 to move only in the axial direction of the screw 1, thereby limiting the rotation of the friction ring 3. Furthermore, by sleeved on the sliding rod 31, the elastic element 4 can avoid bearing the load generated when the friction ring 3 rotates, thereby improving the structural stability of the elastic element 4 and ensuring the stability of the elastic force applied by the elastic element 4 to the friction ring 3.

[0027] Optionally, combined Figure 1 and Figure 2 As shown, the quick-release bolt also includes a limiting block 6 and a retainer 7. The limiting block 6 is located outside the T-slot and is sleeved on the non-threaded part of the screw 1 and is fixedly connected to the screw 1. The retainer 7 is sleeved on the limiting block 6 and is engaged with the limiting block 6. The retainer 7 is also engaged with the T-slot.

[0028] Specifically, the screw 1 includes a threaded portion and a non-threaded portion. The non-threaded portion is located at the end of the screw 1 near the screw head 2. The limiting block 6 is fitted onto the non-threaded portion of the screw 1 and welded to the screw 1 for fixation. The retainer 7 can be a U-shaped block with its opening facing downwards. The U-shaped block includes a top plate and two feet connected to the top plate. The top plate has a connecting hole in the middle with a shape consistent with that of the limiting block 6. The two feet are respectively connected to the two ends of the top plate along its length. In use, the retainer 7 engages with the limiting block 6 through the top plate. At the same time, the two feet can be embedded in the T-shaped groove to engage with the T-shaped groove.

[0029] Thus, by fitting the limiting block 6 onto the non-threaded part of the screw 1 and fixing it to the screw 1, the clamping seat 7 is fitted onto the limiting block 6 and engages with the limiting block 6, and the clamping seat 7 also engages with the T-slot. The clamping seat 7 and the T-slot form an initial positioning, while the clamping seat 7 and the limiting block 6 form a secondary positioning. Under the dual positioning, the rotation of the quick-mounting bolt is further restricted.

[0030] Optionally, combined Figure 1 As shown, the end of the friction ring 3 facing away from the screw head 2 is also provided with an anti-slip structure.

[0031] Specifically, the anti-slip structure can be an anti-slip pattern, anti-slip protrusion, or anti-slip rubber pad, etc.

[0032] Thus, an anti-slip structure is also provided at the end of the friction ring 3 that is away from the screw head 2. The anti-slip structure can increase the friction coefficient between the friction ring 3 and the inner wall of the T-groove, thereby improving the friction effect.

[0033] On the other hand, another embodiment of the present invention also provides a milling auxiliary fixture, including a fixture structure and a quick-release bolt as described above. The base 8 of the fixture structure is used to be detachably connected to the lathe 5 via the quick-release bolt. The fixture structure is also used to clamp and position the workpiece 9 to be milled.

[0034] Specifically, mounting holes are reserved on the base 8, and the screw 1 of the quick-release bolt is used to pass through the mounting holes. After the quick-release bolt is fixed to the required position, the base 8 is connected to the quick-release bolt by the nut, and the fixture structure clamps and positions the workpiece 9 to be milled.

[0035] Thus, the base 8 of the fixture structure is detachably connected to the lathe 5 via quick-release bolts, which ensures the stability of the connection between the fixture structure and the lathe 5 during milling.

[0036] Optionally, combined Figure 3As shown, the fixture structure also includes a first movable seat 10, a second movable seat 11, and a separation transmission mechanism 12. The first movable seat 10 and the second movable seat 11 are slidably connected to the base 8. The first movable seat 10 is used to connect with the milling tool, and the second movable seat 11 is used to connect with the workpiece 9 to be milled. The separation transmission mechanism 12 includes two movable ends, which are used to move away from each other along the milling direction. The first movable seat 10 and the second movable seat 11 are respectively connected to the two movable ends.

[0037] Specifically, the first movable seat 10 and the second movable seat 11 are slidably connected to the base 8, and the sliding direction can be the length direction of the lathe 5. The first movable seat 10 is connected to the milling tool, and the second movable seat 11 is connected to the workpiece 9 to be milled. The first movable seat 10 and the second movable seat 11 move in opposite directions through the transmission mechanism 12, such as... Figure 4 As shown, the separation transmission mechanism 12 includes a first gear 122, a first rack 121, a second gear 124, and a second rack 123. The two movable ends of the separation transmission mechanism 12 are the first rack 121 and the second rack 123, respectively. The first gear 122 and the first rack 121 mesh, and the first rack 121 is connected to the first movable seat 10. The second gear 124 and the second rack 123 mesh, and the second rack 123 is connected to the second movable seat 11. The first gear 122 and the second gear 124 are connected by three meshing bevel gears. When the first movable seat 10 moves, the first rack 121 moves, and the first gear 122 rotates. Through the transmission of three meshing bevel gears, the second gear 124 rotates in the opposite direction to the first gear 122, thus causing the second rack 123 to move in the opposite direction to the first rack 121. Consequently, when the first movable seat 10 moves along the milling direction, the second movable seat 11 can move in the opposite direction to the first movable seat 10. This allows the milling tool and the workpiece 9 to move synchronously in opposite directions, shortening the movement displacement of the milling tool and improving milling efficiency. The gears and racks can be mounted on the base 8 using conventional methods, which will not be elaborated here.

[0038] Thus, by connecting the first movable seat 10 to the milling tool and the second movable seat 11 to the workpiece 9 to be milled, and by setting the two movable ends opposite to the transmission mechanism 12 to move opposite to each other along the milling direction, the first movable seat 10 and the second movable seat 11 are respectively connected to the two movable ends, which can realize the synchronous reverse movement of the milling tool and the workpiece 9 to be milled, thereby shortening the displacement of the milling tool in the milling direction to a certain extent and improving the milling efficiency.

[0039] Optionally, combined Figure 3 As shown, the second movable seat 11 is provided with a workpiece positioning groove, which is used to position the workpiece 9 to be milled.

[0040] Specifically, the opening of the workpiece positioning groove faces upward, and the bottom of the workpiece 9 to be milled can be clamped in the workpiece positioning groove.

[0041] Thus, by positioning the workpiece 9 to be milled through the workpiece positioning groove provided on the second movable seat 11, the workpiece 9 to be milled can be limited, thereby improving the stability of the workpiece 9 to be milled during the milling process.

[0042] Optionally, combined Figure 3 As shown, the fixture structure also includes a workpiece support structure 13, which is located on the side of the second movable seat 11 away from the first movable seat 10. One end of the workpiece support structure 13 is movably connected to the base 8, and the other end is inclined toward the second movable seat 11 and used to abut against the workpiece 9 to be milled.

[0043] Specifically, the workpiece support structure 13 is located on the side of the second movable seat 11 away from the first movable seat 10, that is, the workpiece support structure 13 is located on the side of the second movable seat 11 facing the negative X-axis. The lower end of the workpiece support structure 13 is movably connected to the base 8, for example, by rotation or movable connection. The upper end of the workpiece support structure 13 is inclined toward the second movable seat 11 and abuts against the second movable seat 11. After the workpiece support structure 13 abuts against the second movable seat 11, due to the inclination of the workpiece support structure 13, the force exerted by the workpiece support structure 13 on the second movable seat 11 can be divided into a horizontal force toward the first movable seat 10 and a vertical force downward. The vertical force can overcome the separation of the workpiece 9 from the second movable seat 11 upward, while the horizontal force can overcome the separation of the workpiece 9 from the milling tool.

[0044] Thus, by having the workpiece support structure 13 located on the side of the second movable seat 11 away from the first movable seat 10, and with one end of the workpiece support structure 13 connected to the base 8 and the other end inclined toward the second movable seat 11 and used to abut against the workpiece 9 to be milled, the force exerted by the workpiece support structure 13 on the second movable seat 11 can be decomposed into two components: a horizontal component and a vertically downward component. The horizontal component can overcome the workpiece 9 from moving away from the milling tool to ensure sufficient milling, while the vertically downward component can overcome the workpiece 9 from separating upward from the second movable seat 11 to improve the stability of the workpiece 9 during the milling process.

[0045] Optionally, combined Figure 3 As shown, the workpiece support structure 13 includes a support rod 131, a retaining spring, and a support block 132. One end of the support rod 131 is rotatably connected to the base 8 via the retaining spring, and the other end of the support rod 131 is rotatably connected to the support block 132. The support block 132 is used to abut against the workpiece 9 to be milled. The retaining spring is located at the rotatable connection position between the support rod 131 and the base 8. The elastic force of the retaining spring is used to drive the support rod 131 to rotate toward the second movable seat 11.

[0046] Specifically, the lower end of the top support rod 131 is rotatably connected to the base 8 via a rotating shaft, and a retaining spring is installed at the rotatable connection between the top support rod 131 and the base 8. The elastic force of the retaining spring always drives the top support rod 131 to rotate toward the second movable seat 11. The upper end of the top support rod 131 is rotatably connected to the top support block 132. Under the drive of the retaining spring, the top support rod 131 presses the top support block 132 onto the end face of the workpiece 9 facing away from the milling tool. When changing the workpiece 9, the top support rod 131 can be manually turned counterclockwise to overcome the elastic force of the retaining spring and separate the top support block 132 from the milled workpiece. Then, the next workpiece 9 to be milled is installed on the second movable seat 11, and the top support rod 131 is released. Under the drive of the retaining spring, the top support rod 131 presses the top support block 132 onto the workpiece 9 again. During the pressing process, the angle of the top support block 132 can be adjusted independently through the rotational connection between the top support block 132 and the top support rod 131 to ensure that the top support block 132 can always be in full contact with the workpiece 9 to be milled.

[0047] Thus, one end of the top support rod 131 is rotatably connected to the base 8 via a spring. The spring force drives the top support rod 131 to rotate toward the second movable seat 11, ensuring that the top support rod 131 always tends to rotate toward the second movable seat 11. The other end of the top support rod 131 is rotatably connected to the top support block 132, which abuts against the workpiece 9 to be milled. Under the action of the spring force, the force applied by the top support rod 131 to the workpiece 9 to be milled can be increased. During the rotation of the top support rod 131 toward the workpiece 9, the angle of the top support block 132 can be adjusted independently to ensure that the top support block 132 can always be in full contact with the workpiece 9 to be milled, thereby ensuring the stability of the workpiece 9 during the milling process.

[0048] Optionally, combined Figure 3 As shown, the workpiece support structure 13 also includes a tension spring 133, which is located between the second movable seat 11 and the top support rod 131. The two ends of the tension spring 133 are connected to the base 8 and the top support rod 131 respectively, and the elastic force of the tension spring 133 drives the top support rod 131 to rotate toward the second movable seat 11.

[0049] Specifically, while the spring force drives the top support rod 131 to rotate toward the second movable seat 11, the tension spring 133 applies a downward pulling force to the top support rod 131. Through the cooperation of the tension spring 133 and the spring, the pressing effect of the top support rod 131 pressing the top support block 132 onto the workpiece 9 to be milled is increased.

[0050] Thus, with the tension spring 133 located between the second movable seat 11 and the top support rod 131, and both ends of the tension spring 133 connected to the base 8 and the top support rod 131 respectively, the elastic force of the tension spring 133 drives the top support rod 131 to rotate toward the second movable seat 11, so that the top support rod 131 is simultaneously subjected to the downward force exerted on it by the tension spring 133 and the elastic force of the spring, thereby increasing the pressing effect of the top support rod 131 pressing the top support block 132 onto the workpiece 9 to be milled, and further improving the stability of the workpiece 9 to be milled during the milling process.

[0051] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A quick-release bolt, characterized in that, The device includes a screw (1), a screw head (2) connected to the screw (1), and a friction ring (3). The end of the screw head (2) facing the screw (1) is provided with an elastic element (4). The friction ring (3) is sleeved on the screw (1) and connected to the elastic element (4). The elastic force of the elastic element (4) is used to drive the friction ring (3) away from the screw head (2). The screw head (2) is used to be accommodated in a T-shaped groove on a lathe (5), and the end of the friction ring (3) away from the screw head (2) is used to abut against the inner wall of the T-shaped groove.

2. The quick-release bolt according to claim 1, characterized in that, The friction ring (3) is provided with a slide rod (31) at one end facing the screw head (2). The screw head (2) is provided with a groove. The slide rod (31) is slidably connected to the groove. The slide rod (31) extends along the axial direction of the screw (1). The elastic element (4) is sleeved on the slide rod (31).

3. The quick-release bolt according to claim 1, characterized in that, It also includes a limiting block (6) and a retainer (7). The limiting block (6) is located outside the T-groove and is sleeved on the non-threaded part of the screw (1) and is fixedly connected to the screw (1). The retainer (7) is sleeved on the limiting block (6) and is engaged with the limiting block (6). The retainer (7) is also engaged with the T-groove.

4. The quick-release bolt according to claim 1, characterized in that, The friction ring (3) is also provided with an anti-slip structure at the end away from the screw head (2).

5. A milling auxiliary fixture, characterized in that, Includes a clamping structure and a quick-release bolt as described in any one of claims 1-4, wherein the base (8) of the clamping structure is detachably connected to the lathe (5) via the quick-release bolt, and the clamping structure is also used to clamp and position the workpiece (9) to be milled.

6. The milling fixture according to claim 5, characterized in that, The fixture structure further includes a first movable seat (10), a second movable seat (11), and a separation transmission mechanism (12). The first movable seat (10) and the second movable seat (11) are slidably connected to the base (8). The first movable seat (10) is used to connect with the milling tool, and the second movable seat (11) is used to connect with the workpiece (9) to be milled. The separation transmission mechanism (12) includes two movable ends, which are used to move away from each other along the milling direction. The first movable seat (10) and the second movable seat (11) are respectively connected to the two movable ends.

7. The milling fixture according to claim 6, characterized in that, The second movable seat (11) is provided with a workpiece positioning groove, which is used to position the workpiece (9) to be milled.

8. The milling fixture according to claim 6, characterized in that, The fixture structure also includes a workpiece support structure (13), which is located on the side of the second movable seat (11) away from the first movable seat (10). One end of the workpiece support structure (13) is movably connected to the base (8), and the other end is inclined toward the second movable seat (11) and used to abut against the workpiece (9) to be milled.

9. The milling fixture according to claim 8, characterized in that, The workpiece support structure (13) includes a support rod (131), a retaining spring, and a support block (132). One end of the support rod (131) is rotatably connected to the base (8) through the retaining spring, and the other end of the support rod (131) is rotatably connected to the support block (132). The support block (132) is used to abut against the workpiece (9) to be milled. The retaining spring is located at the rotatable connection position between the support rod (131) and the base (8). The elastic force of the retaining spring is used to drive the support rod (131) to rotate toward the second movable seat (11).

10. The milling fixture according to claim 9, characterized in that, The workpiece support structure (13) also includes a tension spring (133), which is located between the second movable seat (11) and the top support rod (131). The two ends of the tension spring (133) are connected to the base (8) and the top support rod (131) respectively, and the elastic force of the tension spring (133) drives the top support rod (131) to rotate toward the second movable seat (11).

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